Dishwasher is making strange noises

A dishwasher that’s suddenly making strange or unusual noises can be a cause for concern. These noises may range from loud grinding sounds to high-pitched squeaks, and they can disrupt your kitchen routine. However, diagnosing and resolving the issue can often be done with some simple troubleshooting steps. In this guide, we’ll explore potential reasons why your dishwasher is making strange noises and provide solutions to help you address the problem.

Common Causes of Strange Dishwasher Noises

  1. Foreign Objects: Items like utensils, small dishes, or broken glass can fall into the dishwasher’s spray arm or pump, causing unusual noises during the wash cycle.
  2. Loose or Worn Parts: Dishwashers have various moving parts, such as spray arms, racks, and rollers, that can become loose or worn over time, leading to noises.
  3. Hard Objects in the Pump: Hard objects like small bones or seeds can get stuck in the dishwasher’s pump, resulting in grinding or rattling sounds.
  4. Deteriorating Motor Bearings: The dishwasher’s motor contains bearings that can wear out or become damaged, leading to grinding or squeaking noises.
  5. Faulty Water Inlet Valve: A malfunctioning water inlet valve can cause loud humming or buzzing sounds as water enters the dishwasher.
  6. Spray Arm Blockage: Debris or food particles can become lodged in the spray arms, obstructing their rotation and causing strange noises.

Troubleshooting Steps for Strange Dishwasher Noises

  1. Pause the Cycle:
    • If you hear unusual noises during a wash cycle, pause the dishwasher immediately to prevent potential damage.
  2. Inspect the Interior:
    • Open the dishwasher door and carefully inspect the interior for any foreign objects or debris that may be causing the noise.
    • Remove any obstructions found inside the dishwasher, paying close attention to the spray arms and pump area.
  3. Check for Loose Parts:
    • Examine the dishwasher’s racks, rollers, and other moving components for loose or damaged parts. Tighten or replace as needed.
  4. Clean the Spray Arms:
    • Remove the spray arms and clean them thoroughly, ensuring there are no blockages that could hinder their rotation.
  5. Run an Empty Cycle:
    • Occasionally, strange noises can be caused by air bubbles or minor obstructions. Run an empty dishwasher cycle to see if the issue persists.
  6. Inspect the Water Inlet Valve:
    • Check the water inlet valve for visible damage or obstructions. If you notice any issues, consider replacing the valve.
  7. Check the Motor Bearings:
    • If you suspect motor bearing issues, consult the dishwasher’s manual or contact a professional technician for a thorough inspection and possible bearing replacement.
  8. Regular Maintenance:
    • Perform routine maintenance, such as cleaning filters and checking for loose parts, to prevent strange noises from recurring.
  9. Consult a Professional:
    • If the unusual noises persist after troubleshooting, it’s advisable to contact a dishwasher repair technician to diagnose and repair the problem properly.


Strange noises from your dishwasher repair can be alarming, but many issues can be resolved with careful inspection and maintenance. By following the troubleshooting steps outlined in this guide, you can often identify and address the source of the problem. However, if the issue continues or if you’re unsure about performing repairs, seeking professional assistance is the best way to ensure your dishwasher operates quietly and efficiently.


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